Google made a right move by adding web-speed to the search engine ranking. With this change site latency does't just impact the user experience but it will determine where you will be placed in google search results.
This move could be a real game changer as it bring site latency and scalability to the front stage. Sites will not only compete on content but on thier performance. It is now clear that site performance have much more direct impact on our business (as appose to indirect impact resulted in user expereince) then ever before.
In this post i try to provide some architecture guide line on how to control and improve site latency under scale based on a discussion with a leading eCommerce site the Netherland.
See detailed story here